A year after the Eaton fire, residents returning to Altadena confront lingering contamination and little official clarity

One year on from the Eaton fire, long after the vicious winds that sent embers cascading from the San Gabriel mountains and the flames that swallowed entire streets, a shadow still hangs over Altadena.

Construction on new properties is under way, and families whose homes survived the fire have begun to return. But many are grappling with an urgent question: is it safe to be here?

The fire upended life in this part of Los Angeles county. By the time firefighters brought it under control, 19 people were dead, tens of thousands displaced and nearly 9,500 structures destroyed, primarily in Altadena but also in Pasadena and Sierra Madre.

The flames incinerated many older homes and businesses filled with lead paint and asbestos. They showered the community with toxins, leaving tall piles of ash and unseen traces of heavy metals in the soil and along and inside standing structures. Research has indicated some hazards remain even after properties have undergone remediation, the clean-up process that is supposed to restore homes and ensure they are safe to occupy.